Gas-stove burner.



J. P. FARMER.

GAS sTovE BURNER.

(Application med my' 2'9, 1899.)

(No Model.)

Patent'ed .lulyv l0, |900.

STATES A iE PATENT reca@ JOHN r. FAMR, on PORTLAND, OREGON, AssIeNOR on ONn-nALr` To o. F. ADAMs, or sAME PLACE.

oAs-srovE BURNER.

SPECIFICATION forming part of Letters Patent No. 653,622, dated July 10, Application led May 29, 18992. Serial No. 718,693. (No model.)

To all whom, it may concern:

Beit known that I, JOHN P. FARMER, a citizen of the United States, residing at Portland, in the county of Multnomah and State of` Oregon, have invented a new and useful Gas- Stove Burner, of which the followingis a speciication.

My invention relates to burners designed for use in connection with gas-stoves and similar devices; and the object in view is to provide a burner and cooperating valve mechanism constituting an automatic gas cutoff whereby theA extinguishment of the flame at the burner is followed by the closing of a gascontrolling valve to cut off the supply of gas, and thus prevent its escape without burning, and, furthermore, to provide a generating or pilot valve mechanism designed to control the admission of gas to the burner, to cause the actuation of the controlling-valve, and to pro-` vide means between the controlling-valve and the generating or pilot valve whereby the latter is closed simultaneously withl the opening of the former; furthermore, to provide means whereby motion is communicated from a supply-valve to a generating or pilot valve, whereby the latter may be adjusted by means of the former to allow the communication of gas through the channel controlled by the generating or pilot valve to the burner, and also to provide a thermostatic burner-shell whereby the gas-inlet-controlling valve is actuated through the expansion and contraction of said shell, and in connection therewith to provide simple and efficient means for regulating the supply of air to the interior of the burner-shell.

Furtherobjects and advantages of this .inventionvwill appear in theV following description, and the novel features thereof will be particularly pointed out in the appended claims.

In the drawings, Figure 1 is a perspective view of a burner constructed in accordance with my invention. Fig.`2 is a longitudinal section of the same. Fig. 3 is a horizontal sectional view of the valve-casing and adjacent parts, showing the supply and controlling valves closed and the generating or pilot is arranged a controlling-valve 8.

valve in its normal or -Open position. Fig. 4 5o is a similar View showing the supply and coutrollingvalves Open, as when Vthe burner is in full operation, the generating or pilot valve having been closed by the connecting-levers. Fig. 5 is a transverse sectional view of the 55 valve-casing on the plane indicated by the line 5 5 of Fig. 3. Fig. 6`is a longitudinal section of the same on the plane indicated by the line 6 6 of Fig. 3.

Similar reference characters indicate cor- 6o responding parts in all the figures of the drawings.

1 designates a burner-shell constructed of material which is expansible by heat, such as hard brass or the equivalent thereof, said shell being of the star shape illustrated or of any other preferred form, with suitable burner perforations in the upper surface thereof and having a central air-supply passage 2. The burner illustrated in the draw- 7o ings is of sectional` construction, comprising anupper member l and a lower separable member lb, having a suitable supportingdevice 3. vCommunicating with the interior Vof the shell and preferably threaded upon a nipple 4, extending radially from the upper shell section or member, is a collar 5, forming an inlet conductor in communication with a valve-casing 6, and in this conductor is a valve-seat 7, in operative relation with which 8o The stem 9 of this controlling-valve extends through the burner shell, preferably between the planes of the air-supply branch openings 10, which communicate with the above-described air-supplypassage 2, and said valve-stem is constructed of a dierent material from the burner-shell and preferably of a metal hav-V ing a lower ratio of expansion or having practically no expansion when subjected to heat, 9o such as neutral steel. The valve-stem at that end remote from the controlling-valve is adjustably fitted in a radial opening in the shell, whereby the valve may be ladjusted when the burner-shell is cold to snugly fit the 9 5 valve-seat, and thus close the inlet-'conveyer to exclude gas which may be contained in the valve-casing from the interior of the burner.

In practice said stem is preferably threaded in said opening in the burner-shell and its exposed end is constructed to form a wrench or key seat 11, whereby the rod may be turned by the exterior application ot' a suitable tool to adjust the stem axially, and thus vary the position of the controlling-valve with relation to its seat to insure the tight gas-excluding seating of said valve when the burner is cold or has cooled to a temperature less than that at which it would be maintained by the ignition of gas at the burneropenings. Also communicating with the burner-inlet passage or the bore of the conveyer between said controlling-valve seat and the burner is a generating or pilot channel 12, which extends into the valve-casing 6 and is fitted with a generating or pilot valve 13, the opening of said valve serving to allow gas within the valvecasing to pass to the burner around or independently of the controlling-valve by which the main conductor connecting the burner with the valve-casing is closed. Also in communication with .the interior of said valvecasing is a supply-pipe 14, fitted with a supply-valve 15, having an exposed or exterior handle 16, which may be of the ordinary or any preferred construction, whereby gas may be admitted from the supply-pipe to the interior of the valve-casing for communication through the generating or pilot channel or through the main burner-inlet conductor to the interior of the burner-shell.

The generating or pilot valve is provided with radial Wings or shoulders 17 and 18, in operative relation with the former of which is arranged the extremity of a shifting arm 19, adapted to be actuated by the stem of the controlling-valve when the latter is moved to unseat the controlling-valve in the burnerinlet conductor. Various means of connection between the controlling-valve stem and said shifting arm may be employed; but in the construction illustrated the controllingvalve stem is provided with an extension 20, fitted terminally with a stop 21, preferably consisting of a nut threaded upon said extension and an operating arm 22, pivotally lnounted at one end in the valve-casing, and having said stop on the valve-stem extension arranged in operative relation therewith at a point adjacent to said pivot, the free end of said operating-arm bearing upon the shifting arm at a point near the pivot of the latter. Thus a slight axial movement of the valvestem suiicient to unseat the controlling-valve will be communicated to the operating-arm 22 at a point near the pivot of the latter, and this motion, multiplied by the length of said operating-arm, will be communicated to the shifting arm at a point near the pivot of the latter, and this motion will in turn be multiplied by the length of the shifting arm and communicated to said shoulder or wing 17 of the generating or pilot valve to close said valve, and thus cut olf the communication of gas from the valve vcasing to the burner through the generating or pilot channel which is controlled by said valve. Thus the wings or shouldered portion of the generating or pilot valve constitutes a rocker with which coperate multiplying-levers actuated by the thermostatic burner-shell through the draw-rod formed by the stem of the controlling-valve to cause the closing of the generating or pilot valve simultaneously with the opening of the controlling-valve, whereby after a ilame fed through the generating or pilot channel has existed for a sulicient length of time to heat' and expand the bu mer-shell, and thus unseat the controlling-valve, said generating-channel will be closed, and the burner will be fed solely through the main channel formed by the con veyer. Therefore should the flame at the burner be extinguished otherwise than by cutting olf the supply of gas by suitable manually-operated means provided for that purpose (and hereinafter described) the contraction of the burner-shell, due to the cooling thereof, will return 'the controlling-valve to its seat, and thus automatically close the conveyer to prevent the escape of the gas.

Any suitable supply-Valve mechanism may be employed in connection with the apparatus as above described to admit gas to the valvecasing for communication through the generating-channel to the burner; but in the drawingslhave illustratedastop-cock 15 similar in construction to those now in common use in connection with gas-stoves, the same, or its stem, being provided with an ear, stud, or other projection 23 for con tact with the shoulder or ear 18 of the generating or pilot valve rocker, said projection and wing or ear being so related that when the supply-valve is closed the generating or pilot valve will be open. After the movement of the valve-stem to close the main burner-passage the parts 13, 19, and 22 are restored to their normal positions, as shown in Fig. 3, by manipulating the valve-handle 16. Thus in operation when it is desired to light the burner the supply-valve is opened to admit gas to the valve-casing, and from said casing it passes through the generating-channel to the burner. After the flame thus fed through the generating-channel has burned for a sucient length of time to expand the thermostatic burner-shell the controlling-valve will be opened and the generating or pilot valve closed, as hereinbefore explained. Should the flame be extinguished,

vaccidentally or otherwise than by closing the supply-valve, the controlling-valve will be automatically closed. On the other hand, if the supply of gas is cut olf by closing the supply- Valve the movement of the latter will open the generating or pilot valve, whereupon the subsequent opening of the supply-valve to again start the burner will be accomplished by the communication of the gas through the generating-channel. By having the stem 9 parallel to the perforated upper Wall of the IOO IIO

IZO

burner the stem is uniformly heated throughout its length, thus hastening the opening of the valve 8.

The interior of the burner-shell is adapted to perform the function of a mixer, and in order that a combustion-supporting agent, such as atmospheric air, may be admitted thereto under control I provide the same with an inlet 24, provided with a disk-valve seat 25, having a port 26, and an adjustable disk valve 27, centrally pivoted upon said seat and having an opening 28, adapted to register with said port. By means of this disk valve a su pply of air in any desired quantity may be admitted to the shell to serve as a combustionsupporting agent, the disk being provided with a milled periphery to facilitate the manual adjustment thereof.

It will be seen that the supply-valve, controlling-valve, and pilot-valve are all operatively coupled by suitable connections, so that the pilot-valve is automatically operated by either the controlling-valve or the supplyvalve. The controlling-valve in the act of opening closes the pilot-valve, and the supply-valve in the act of closing opens the pilotvalve to admit gas to the mixing-chamber. As the supply-valve is closed the lever 22 will dex sufficiently to admit of said valve being closed.

Various changes in the form, proportion, and the minor details of construction may be resorted to without departing from the spirit or sacricing any of the advantages of the invention.

Having described my invention, what I claim isl. The combination with a thermostatic burner-shell, a gas-conveyer, and a controlling-valve operatively connected to the shell for actuation thereby, of a pilot-channel, a pilot-valve therefor, a supply-valve, and connections between all of said valves whereby they are operatively coupled.

2. The combination with a thermostatic burner-shell, a gas-conveyer, and a controlling-valve having its stem operatively connected with said shell for actuation by the expansion and contraction thereof, of a generating or pilot channel, a generating or pilot valve controlling said channel, and operating connections between said controllingvalve and the generating or pilot valve, sub

stantially as specified.

3. The combination with a thermostatic burner-shell and a communicating gas-conveyer, of a controlling-valve for said gas-conveyer actuated by said shell, a generating or pilot valve controlling an independent gaschannel, and operating connections between said controlling-valve and the generatingvalve whereby the latter is closed simultaneously with the opening of the former, substantially as specified.

4. The combination with a thermostatic burner-shell and a communicating gas-conveyer, of a generating or pilot valve controlling an independent gas-channel, a controlling-valve-stem extension actuated by said thermostatic burner shell, and means between said stem extension and the generating or pilot valve, whereby the latter is operated by the former, substantially as speciiied.

5. The combination with a thermostatic burner-shell and a communicating gas-conveyer, of a generating or pilot valve controlling an independent gas-channel, a controlling-valve-stein extension, actuated by said thermostatic burner-shell, an adjustable stop carried by said stem extension, and means, operated upon by said stop for actuating the generating or pilot valve, substantially as specified.

6. The combination with a thermostatic burner-shell and a communicating gas-conveyer, of a generating or pilot valve controlling an independent gas-channel, a controlling-valve-stem extension actuated by said thermostatic burner-shell, a shifting arm operatively related to said generating or pilot valve, and means for causing said stem eX- tension to operate the shifting arm, substantially as specified.

7. The combination with a thermostatic burner-shell and a communicating gas-conveyer, of a generating or pilot valve controlling an independent gas-channel, a controlling-valve-stem extension actuated by said thermostatic burner-shell, a shifting arm operatively related to the generating or pilot valve, an operating-arm operatively related to said shifting arm, and means for communicating motion from said stem extension to the operating-arm, substantially as specied.

8. The combination with a burner and a communicating gas-conveyer, of a generating or pilot valve controlling an independent gaschannel, a controlling-valve-stem extension, a shifting arm operatively related to the generating or pilot valve, an 4operating-arm operatively related to said shifting arm, and a stop on said stem extension for contact with the operating-arm to communicate closing motion to the generating or pilot valve, substantially as specified.

9. The combination with a burner and a communicating gas-conveyer, of a generating or pilot valve controlling an independent gaschannel, a controlling-valve-steln extension, a shifting arm operatively related to the generating or pilot valve, an operating-arm operatively related to said shifting arm, and an adjustable stop carried by said stem extension and consisting of a nut threaded thereon for contact with said operating-arm to communicate closing motion to the generating or pilot valve, substantially as specified.

l0. The combination with a burner having a gas-conveyer, and a thermostatically-actuated controlling-valve for said conveyer, of a generating or pilot valve controlling an independent gas-channel, operating connections IOO IIO

i c Q 4 653,622

between the controlling-valve and the generating or pilot valve, for communicating closing motion to the former when the latter is opened, and a supply-valve provided with means' for oommiinicating opening motion to the generating or p'ilot valve, substantially as specified ll, The combination with aburncr having a gas-conveyer, a thermostatically-actdated controlling-Valve for said eonveyer, of a generating or pilot valve controlling an independent gas-ehannel, operating connections between the controlling-valve and the generating or pilot Valve, for communicating closing motion'to the latter when the former is opened, a supply-valve, and means for communicating opening motion to the generating or pilot Valve from the supply-Valve, as the latter is closed, substantially as specifiedi l2. The combination with a burner having a gas-conveyer, a thermostatically-actuated controlling-valve for said conveyer, of a generating or pilot valve controlling an independent gas-channel, operating connections between the controlling-valve and the generating or pilot valve, for communicating closing motion to the latter when the former is opened, a supply-valve, and coperating proj eotions on said generating and supply valves whereby opening motion is communicated to the former during the closing motion of the latter, substantially as specified.

13. The combination with a burner having a gas-conveyer, a thermostatically-actuated controllingvalve for said conveyer, of a gen,- erating or pilot valve controlling an inde, pendent gaslchannel and having a winged rocker, a shifting arm operatively related to said rocker, means operated by the controlling-valve stem for actuating Said shifting arm to close the generating or pilot valve, and a supply-Valve having a projection for engagement with a wing or shoulder of said rocker to communicate opening motion to the generating or pilot valve, substantially as specified.

In testimony that I claim the foregoing as my own I have hereto aixed my signature in the presence of two witnesses.

JOHN P. FARMER.

Vitnesses:

A. L. MILLS. GEO. E. STREETER. 

